新型渐增燃烧球形发射药的燃烧性能

摘要

提出了含微气孔结构分层球形药(LPBP)的燃烧物理模型,进而给出数学模型,模拟其定容燃烧时的燃气生成规律.最后使用密闭爆发器测试LPBP的燃烧性能,并与模拟结果进行了对比讨论.结果表明,特殊的壳芯结构有效地改善了球形发射药燃烧时的产气规律,调整分层厚度、壳层芯层密度之比可得到不同渐增燃烧性能的发射药,但壳层厚度比例大于60％时,发射药渐增效果不再明显.%The physical and mathematical model of the combustion process of layered porous ball propel-lant (LPBP) was put forward, according to which the gas generation of LPBP combusted in constant volume was calculated. The combustion performance of LPBP was validated in a closed-vessel. The results show that the predefined structure distribution can effectively improve the combustion performance of LPBP, and the gas generating rate of LPBP can be controlled by adjusting the density and the dimension ratio of shell to core layer, however, the progressive burning of LPBP will wear away when the shell-layer is thicker than 60%.